Hydrometer (2B40.60)

Description:

Hydrometers float in two different liquids to demonstrate liquid density measurement and buoyancy.

Procedure or Operation Notes:

At room temperature (approximately 20° C):

Water (tap): Just barely less than 1.000:

Denatured Ethanol (5% Methanol, 5% 2-Propanol): 0.790:

Note: There are many different types of hydrometers for specific applications. Our hydrometers are uncalibrated, undocumented, and are for general discussion only.

References, Comments, or Footnotes:

1) See the Elevator Paradox [Wikipedia] about a hydrometer on an elevator.